Edmund blunt



Letters Patr-mf No. 79,440, dated June 30, ISGS.

ELECTRO-MAGNETIC BURGLAR AND FIRE-ALARM.

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TO ALL WHOM I'I MAY CONCERN:

Be it known that I, EDMUXD BLUNT, Jr., of Bay Ridge, Kings county, New York, have invented, made, and applied to use, a new and useful Electro-Magnetic Fire and Burglar-Alarm; and I do declare that the fol- 'lowing is a full, clear, and correct description of my invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which- Figure l is a back viewof my improved re and burglar-alarm. Figure 2 is a front View of the annunciator. Figure 3 is a view, showing'connection of door. Figure 4 is a. view, showing connection of window. Figure 5 is a view of the alarm employed. Figure 6 is a view of the lire-indicator employed.

Figure 7, view, showing connection of apparatus with battery. In the'drawings, like parts of the invention are designated by the same letters of reference. The natureot` my invention consists in certain improvements, as more fully hereinafter set forth, inthe construction and operation of an electro-magnetic tire and burglar-alarm.

' To enable those skilled in the arts to malte and use my invention, I will describe the construction and operation oi the same. The Alarm.

A shows a. shelf, for supporting the alarm; I3 and B2 are the brackets for supporting the coils C, coinposed bf soft pieces of iron, having wire coiled upon them.

D is a standard, for supporting the gong E, made of any desired size.

F is the vibrating-armature, secured to and supported by the springs G.

II is the hammer for striking the gong, which hammer is operated by the handle I, secured at or near the centre of the armature F.

J are the circuit-breakers, three being generally employed, consisting of strips of steel, secured between the adjustable plates K, the upper ends of which circuit-breakers bear upon or press against the back of the plate of metal L, connected te and forming part of the vibrating-armature.

M is an upright piece, secured to the shell` A, and provided with an adjusting-screw, N, the forward end ot' which has its hearing directly against the armature, regulating or governing the extent of vibration given to the same.

PI2 are screw-cups, secnredcto the shelf A, to receive the ends of copper, insulated wires, the opposite ends of said wires living held in screw-cups. secured in the annunciator.

The D001'.

l shows the door oi' an apartment, which, in order that any attempt to open the sume shall be communicated to the proprietor ol' the house, should be connected to thc alarm, the annunciator, and the battery.

The jainb of thelloer is slotted, to receive a spring, Q, working into the square opening 3, in a plate of metal, set also in the jamb. This spring is connected to the battery and to the alarm, and the plate of metal also connected to the alarm and the battery, as shown in lig. 7.

Within the door is seeured'a regulating-screw, d, which is so positioned that it shall he opposite the spring 2, which it shall impinge against when the door is opened or partially opened.

i The Window.

When desired to connect the alarm with Iawindow, the jainb of the saine is slotted, to receive a. plate of metal,i`to which a wire runs from the annuneiator; or this wire may be attached to a spring, 5, secured in the jamb of the window.

A spring or plate of metal is employed for boih the upper and lower sashes. As the upper sash is lowered.

or the lower sash is raised, the spring is thrown in by the pressure of the sash upon it, and is brought into centact with the plate of` metal secured in the jamb. i I

T/te Annunciato): he annunci-:ttor consists of a slab of wood, having a series of screw-cups, G, secured in its upper and. to. receive the wires running from the upper and lower sashes, firefindieater, and door.

Beneath these are secured the screw-cups T, to receive the inain-eircuit and return-circuit wires.

. On the opposite side of theslab are placed soft pieces of'iron, having wire coiled around them, 8, and connected to the screw-cups, in front, by wires passing from the rear of the screw-clips to the pieces of` iron.

These wires pass around each piece of iron, and finally, form one wire, terminating in a button, 9.

These pieces ofssof't iron are provided with the armatures 10, having attached to them the long arms 11, the lower portions of` which are flattened, to admit ot` their covering the openings iii the slab.

12 is a switch, pivoted to a button, 13, from which button runs a wire, connecting with the battery.

14 is a second button, having a wire attached te it, and ruiming to the alarm.

The Fi'e-Lztlz'cator.

llhis consists of a hollow drum, 15, the under side of` which is corrugated, suspended iii a bracket, 16, secured, in any desired position, near the ceiling of` the room.

17 is a lower bracket, to support a disk, 18, provided with a spindle, having a screw-thread cut upon it, which is inserted in the bracket 17. The f'aoe of` this disk has marked upon it figures, indicating different degrees of heat, in order that the setting of` the alarm may be facilitated.

Such being the construction, the operation may be thus described:

In fig. 7, the connection of the alarm, battery, and annunciator with the door, window, and fire-indicator, is clearly shown.

In case an attempt be made to open the door, the regulating-screw or pin, which, as long as the door is closed, bears directly against the spring secured in the jamb, is relieved from contact with the same, allowing the spring to move forward, and impinge upon on'e side of` the square opening in the plate of metal.

Bythis impingement, connection being formed between the battery, the alarm, the door, anda the annunciator, an alarm is given, and the location indicated, as more fullyvdescribed, by the annuneiator.

When the door is closed, the spring is thrown in by the pin or regulating-screw, and away from the opening in the plate ol metal, thus severing or breaking the connection between the battery, door, and alarm.

If the spring, from any cause, be thrown back too far, it will impinge upon the opposite side ofthe opening in plate of metal, and the alarm will be sounded. l

In the case ot' the window, if` either the upper sash be lowered, or the lower sash raised, the spring resting upon the side ofthe sash is thrown in and against the Aplate o f` metal, thus establishing connection between the upper or lower sash, (as the lease may be,) the battery, the alarm, and the annuneiator, and an alarm is given, and the location indicated by the annunciator, as described. i

In case of fire breaking out in the room in which the fire-alarm is placed, the operation is as follows: As theitemperature increases, and heats the air contained in the hollow drum, the same expands, andthe corrugated surface of the same, being thinner than any other portion, and, consequently, more sensitive, yields to the expansion, and moves out, and is brought into contact with the spindle of` the disk.

By this contact, the circuit is established between the alarm, the battery, and the fire-indicator, and an alarm is sounded.

The fire-indicator being also connected to the annunciator, the location is announced.

The operation of the annunciator may be thus described:

I have already spoken of its construction, and shown its connection with the door, sash-es, fire-indicator, alarm, and battery.

Over the openings in the annunci-otter, I place slips of paper, having printed on them the names of the various part connected with the annunciator, as lower sash, upper sash, fire-indicator, doen i An alarm having been sounded, and it being desired to ascertain in what quarter the danger is, the switch is moved froirtits place beneath the button, and over the ybutton 14, by which movement the battery-circuit is breken, the alarm ceases to ring, andfiby pressing the switch upon the button 1%, the circuit is established betwcen'the window or door which is opened, or the room in which the fire-indicator has been placed, the annunciator, and the battery, and the current passes through its appropriate wire, around the proper piece of soft iron, with the wire coiled round it, converting the same into a magnet, which attracts the armature 10, by which attraction the flattened portion ot the arm is brought directly over the openingin the annunciator, designating the part exposed to danger.

When the switch is restoredto its original position, the circuit is re-formcd between the alarm, window, doer, {ire-indicator, and battery. Y

1t will be observed that the armature employed by me varies materially in construction from the armature at present used, minebeing far simpler, the yspiral spring employed to cause return of armature after the circuit has been broken being not employed, and that the current passes more freely, owing to the non-employment of the pivot usually used.

The armature requires ne adjustment from the operator, and, as constructed, will be found more durable.

The circuit-breaker is composed of three springs, instead of' one, usually used, so that, if' accidental insulation occur under one, the others are found sufieientto-operate.

The annunciator employed is so constructed that the indications or announcements are seen at once bythe flottent@ ortions of the arms being brought opposite the openings.

This differs'essentially from the mode of announcing at present in use in conjunction with burglar-alarms, in which the announcement is arrived at by feeling. The present mode is more rapid and reliable.

The pin or screw, secured directly in the door, secures the same, and renders it much more diflicult for thc burglar to open the door without sounding tbc alarm.

Having thusdescribed my invention, what is claimed as new, and for which I ask Letters Patent, is

1. Combining with the armature F the springs G, substantially as and for the purpose specified.

2. The circuit-breakers J, formed of one or more strips of metal, secured substantially as described.

3. Combining with the slab, provided with theopenings und screw-cups 5 and 7, the arms 11, armatures 10, coils 8, switch 12, andbuttonsl and 14, when the same shall be combined and operate substantially as shown, for the purposes indicated.

4,. Combininr with the door the spring 2, plate of metal 3, and regulating-s substantially as descrhed.

5. Combining with the drum 15 the disk 18, when the same shall be substantially as described. i

6. In combination with the subject-matter of the third claim, the door and alarm, when the same shall be combined and. operate substantially as and for'the purpose spccied.

I 7. In combination with the. subject-matter of the third clause of claim, the window and alarm, when the same shall be combined and operate substantially as and for the purpose specified.

8. In combination with the subject-matter of the third clause of claim, the drum `15 and disk 18, when the same shall be combined and .operate substantially as described.

crew 4, connected and operating ,combinent constructed, and operate EDMUND BLUNT, Jn.

Witnesses:

A. SIDNEY DoANr., GATES WILLARD. 

